Activity的管理类

import java.util.ArrayList;
import java.util.List;

import android.app.Activity;

public class ActivityManager {

public static List<Activity> activities = new ArrayList<Activity>();

public static void addActivity(Activity activity) {
activities.add(activity);
}

public static void removeActivity(Activity activity) {
activities.remove(activity);
}

public static void finishAll() {
for (Activity activity : activities) {
if (!activity.isFinishing()) {
activity.finish();
}
}
}
}